<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style type="text/css">
		.box{
			/*width: 200px;
			height: 200px;
			background: red;
			margin-top: 150px;*/
			/*border: 1px solid green;*/
			/*padding-top: 1px;*/
		}
/*
		.son{
			width: 100px;
			height: 100px;
			background: blue;
			margin-top: 100px;
		}*/
/*
		*{
			display: inline-block;
		}
*/


	</style>
</head>
<body>
	<div class="box">
		<div class="son"></div>
	</div>
</body>
</html>